Check-In: Questions 16–19

Ming and Jerome are playing Factor 40. Their game board and score box are shown above.

  1. Jerome, Player O, decides to choose 38 for his next turn, since it is a large number with few unmarked factors on the board.
    1. What are the unmarked factors of 38 on the game board?
    2. How many more points does Jerome score than Ming for this turn if Ming finds all the factors?
    3. It is against the rules to mark a number that does not have any available factors. What other numbers could Jerome pick on this turn instead of 38?
    4. Is 38 the best number for Jerome to choose on this turn? If not, which number is the best choice? Show how you know.